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Mathematics 9 Online
OpenStudy (anonymous):

what is cos^-1 (-0.345) what is cos^-1 (-0.345) @Mathematics

OpenStudy (anonymous):

are you allowed to use your calculators to figure these out?

OpenStudy (anonymous):

lol

OpenStudy (anonymous):

i just want to know how to evaluate/solve this things without calc...my teacher is craze...he may not let us use caclc

OpenStudy (anonymous):

also it better helps me understand

OpenStudy (anonymous):

what would arsin(-0.453) be then

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